Q:

What is a grouping of coral islands?

A:

Quick Answer

A grouping of coral islands is known as an atoll. Atolls can be a collection of small islands or one continuous island. They form from the remnants of undersea volcanoes.

 Know More

Full Answer

A group of coral islands, or an atoll, form as underwater volcanoes grow and get closer to the surface, effectively raising the sea floor. Once within reach of sunlight in sufficient amounts, corals and other marine life take hold. As volcanoes erode due to wave action and wind, the hard corals remain. Because of this, most atolls are ring-shaped. Islands form over time as corals die and their hard exteriors break down into the sand. Coral islands have distinguishing characteristics, such as high elevations, reef-front terraces and mostly submerged reefs.

The ring shape of the atoll is not always at a consistent height, as different areas of the volcano erode at different times. In such cases, a collection of coral islands is formed. Additionally, if a large section of the volcano falls away, crescent-shaped atolls begin to develop. Because of the way they are formed, atolls partially or completely enclose a central lagoon. These lagoons are oases for marine life, as they are sheltered from the harsh conditions of the open ocean.

Learn more about Australia

Related Questions

  • Q:

    What are the Canary Islands known for?

    A:

    The Canary Islands are known as an important part of the ancient world. The islands became a notable base for Christopher Columbus as he made his voyages to discover America. This made the Canary Islands a figurative bridge between Europe and the Americas.

    Full Answer >
  • Q:

    What islands make up the West Indies?

    A:

    The islands that make up the West Indies are as follows: Cuba, Jamaica, Hispaniola (Haiti and the Dominican Republic),and Puerto Rico, known collectively as the Greater Antilles; and the Virgin Islands, Anguilla, Saint Kitts and Nevis, Antigua and Barbuda, Montserrat, Guadeloupe, Dominica, Martinique, Saint Lucia, Saint Vincent and the Grenadines, Barbados, and Grenada, the Lesser Antilles. These are the two main geographical regions that make up the West Indies.

    Full Answer >
    Filed Under:
  • Q:

    Where is Sydney, Australia located?

    A:

    Sydney, Australia, is located in the state of New South Wales, which is on the country's southeast coast along the Tasman Sea. It is located to the east of the Blue Mountains, to the south of the Hawkesbury River and to the north of Royal National Park.

    Full Answer >
    Filed Under:
  • Q:

    What is Australia known for?

    A:

    The nation of Australia features unique natural wonders ranging from coral reefs to waterfalls, and it is also home to a host of unique plant and animal species. According to Travel Australia, more than 80 percent of plants, mammals and reptile species in Australia are not found anywhere else in the world. Culturally, the people of Australia are known for their laid-back disposition.

    Full Answer >
    Filed Under:

Explore